<template>
   <div class="container" @click="handleGallaryClick">
       <div class="wrapper">
            <swiper :options="swiperOptions" v-if="showSwiper">  <!--swiper有完整的list数据来创建，而不是空数组，空数组的时候length是为0-->
                <swiper-slide v-for="(item,index) of imgs" :key="index">
                    <img class="gallary-img" :src="item">
                </swiper-slide>                
                <div class="swiper-pagination"  slot="pagination"></div>
            </swiper>
       </div>
   </div> 
</template>
<script>
export default {
    name:'CommonGallary',
    props: {
        imgs:{
            type:Array,
            default () {
                return []
            }
        }
    },
    data () {
        return {
            swiperOptions:{
                pagination: '.swiper-pagination',
                paginationType: 'fraction',
                observer:true,     //dom自我刷新一次
                observeParents:true, //解决轮播卡顿问题
                loop:true,
                //initialSlide: this.activeIndex //默认第几张开始播放
            }
        }
    },
    methods:{
        handleGallaryClick () {
            this.$emit('close')
        }
    },
    computed:{
        showSwiper () {
            return this.imgs.length
        }
    }
}
</script>
<style lang="stylus" scoped>
.container >>> .swiper-container
    overflow:inherit      //底部显示多少张图片
.container
    display:flex
    flex-direction:column
    justify-content:center
    z-index: 99
    position:fixed
    left:0
    right:0
    top:0
    bottom:0
    background:#000
    .wrapper        
        width:100%
        height:0
        padding-bottom:100%
        .gallary-img
            width:100%
        .swiper-pagination
            color:#fff
            bottom: -1rem
</style>

